#045557
Closest named color: Deep Teal (#00555A). oklch(40.8% 0.068 197.6), rgb(4, 85, 87).
Aa
White text reads best on this color (8.59:1).
About this color
#045557 is a dark, muted teal or cyan. In OKLCH its lightness is 41%, its chroma 0.068 and its hue 198°. Its hue sits on the cool side of the wheel. The nearest named color is Deep Teal (#00555A), ΔE 0.005 away. White text reads best on it, at 8.59:1.
| Hue family | Teals and cyans |
| Lightness | dark (41%) |
| Chroma | muted (0.068) |
| Temperature | cool |
| Nearest name | Deep Teal (#00555A) |
| Black text | 2.44:1 |
| White text | 8.59:1 |
Values
| HEX | #045557 |
| RGB | rgb(4, 85, 87) |
| HSL | hsl(181, 91%, 18%) |
| OKLCH | oklch(40.8% 0.068 197.6) |
Contrast
WCAG 2 contrast ratios are the conformance target: AA needs 4.5:1 for body text and 3:1 for large text, AAA needs 7:1. APCA Lc values are supplementary guidance from the WCAG 3 drafts.
| Pair | WCAG 2 | Result | APCA | APCA guidance |
|---|---|---|---|---|
| White text on #045557 | 8.59:1 | AAA | Lc -93.7 | Preferred for body text |
| Black text on #045557 | 2.44:1 | Fails | Lc 14.9 | Not readable |
| #045557 text on white | 8.59:1 | AAA | Lc 89.1 | Fine for body text |
| #045557 text on black | 2.44:1 | Fails | Lc -13.1 | Not readable |
Tints and shades
A 50–950 scale built in OKLCH: the hue is held, lightness follows a Tailwind v4-like curve, and every step is kept inside the sRGB gamut. This color sits at step 800.
-
Step 50
50
#F2F7F7
oklch(97.2% 0.005 197.1)
-
Step 100
100
#E2ECEC
oklch(93.6% 0.011 197)
-
Step 200
200
#C9DEDE
oklch(88.5% 0.022 196.8)
-
Step 300
300
#A4C9CA
oklch(80.9% 0.039 198.4)
-
Step 400
400
#6FADAF
oklch(70.6% 0.064 198.4)
-
Step 500
500
#44999B
oklch(63.2% 0.082 197.4)
-
Step 600
600
#1A8386
oklch(55.6% 0.089 197.9)
-
Step 700
700
#056F71
oklch(49.2% 0.083 197)
-
Step 800
800 (this color)
#045557
oklch(40.8% 0.068 197.6)
-
Step 900
900
#174A4C
oklch(37.7% 0.053 198.8)
-
Step 950
950
#102B2C
oklch(26.9% 0.033 198.6)
#045557 with color blindness
Simulated with the Machado et al. (2009) model. ΔE is how far the color moves: below about 0.02 you would not notice a change.
| Vision | Seen as | Shift (ΔE) |
|---|---|---|
| Protanopia (no red cones) | #4E5057 | 0.070 |
| Deuteranopia (no green cones) | #434957 | 0.064 |
| Tritanopia (no blue cones) | #005855 | 0.012 |
| Achromatopsia (no color) | #4C4C4C | 0.069 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #045557
#045557
oklch(40.8% 0.068 197.6)
- #6A3A3C
#6A3A3C
oklch(40.9% 0.068 17.8)
Analogous
Neighbouring hues, 30° either side.
Split complementary
The two hues beside the complement (150° and 210°).
Triadic
Three hues spaced 120° apart.
Palettes with this color
Curated palettes that contain a color within ΔE 0.04 (OKLab) of #045557, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Teal #00555A ΔE 0.005
- Dark Blue Green #005249 ΔE 0.024
- Dark Teal #014D4E ΔE 0.028
- Dark Slate Gray #2F4F4F ΔE 0.031
- Petrol #005F6A ΔE 0.039
- Charcoal #264653 ΔE 0.049
- Dark Green Blue #1F6357 ΔE 0.051
- Dark Grey Blue #29465B ΔE 0.055
Use #045557 in your product
Turn it into light and dark UI roles checked for contrast, then export to Tailwind v4, shadcn/ui, CSS or design tokens.